Package and a material for forming said package

ABSTRACT

A package for enclosing a food product is provided. The package comprises a hollow body of a packaging laminate extending from a closed bottom end towards an upper end, and a top portion of a polymeric material being connected along its periphery to the upper end of the hollow body for closing the package, wherein the periphery of the top portion is defining a planar shape having a waist.

TECHNICAL FIELD

The invention relates to the field of packages for storing foodproducts. More particularly, the invention relates to packages beingformed at least to some extent by a packaging material.

BACKGROUND OF THE INVENTION

Within the food industry, it is common practice to pack liquid andpartly liquid food products in packages manufactured from a packaginglaminate comprising a core layer of paper or paperboard and one or morebarrier layers of, for example, plastic or aluminum foil.

A common packaging type is manufactured in a packing and filling machinein which blanks of a packaging material are formed into tube forms whichare then sealed at one end by means of a top of thermoplastic materialthat is injection molded direct on an open end portion. After thepackage is filled through the open bottom end, the bottom end is sealedand folded. The blanks of packaging material may for example be cut froma magazine reel of packaging laminate.

Methods for assembling such packages are well known and several methodsare subject to granted patents or pending applications in the name ofthe applicant.

A package of the above described type typically comprises a body ofpackaging material being cylindrical or having another form showing asymmetrical cross-section, and a convex top of thermoplastic material,which top is equipped with an opening mechanism for providing dischargeof the enclosed product.

Such package encounters a number of disadvantages. A particular problemoccurs when the size of the package is increased, e.g. to 1 to 2 liters.For such volumes, the longitudinal body of packaging material will havea large cross-sectional area leaving it hard or even impossible for someusers to hold the package with only one hand. Hence, prior art packagessuffer from cumbersome handling capabilities.

SUMMARY

It is, therefore, an object of the present invention to overcome oralleviate the above-described problems.

Another object of the present invention is to provided a user-friendlypackage, also for packages enclosing a volume of e.g. 2 liters.

A further object of the present invention is to provide a package thatallows the user to easily understand how the package should be heldduring discharge.

An idea according to the present invention is to provide a package thatexhibits a handle integrally formed with the package.

A yet further idea is to construct the handle such that an increasedrobustness is achieved when the package encloses a large amount ofproduct, and such that the robustness is decreased as the package isemptied.

A further idea is to provide a package which allows users havingdifferently sized hands to maneouvre the package comfortable.

A still further idea is to provide a package wherein a flexible body isconforming to the shape of a more rigid top portion. Hence, the flexiblebody may be made of a more environmental friendly material, while at thesame time its shape is ensured.

According to a first aspect of the invention, a package for enclosing afood product is provided. The package comprises a hollow body of apackaging laminate extending from a closed bottom end towards an upperend, and a top portion of a polymeric material being connected along itsperiphery to said upper end of said hollow body for closing saidpackage, wherein said periphery of said top portion is defining a planarshape having a waist. This is advantageous in that a handle is providedshowing a sufficient stability when the package is filled as well aswhen the package is almost empty without the use of excess material.

The planar shape may be symmetrical.

The top portion may comprise a reclosable opening for allowing foodproduct being enclosed inside said package to be discharged through saidopening. The opening may be arranged off-center on said top portion.Hence, the user may be directed in how to hold the package for optimumperformance during discharge of enclosed food product.

The cross-section of the closed bottom end of said hollow body may havea shape being different from the planar shape being defined by theperiphery of said top portion. This allows flexible design, stillproviding advantageous functionality and robustness.

The top portion may be made of HDPE, which is preferred since the topportion may be injection molded by well-known processes.

Each one of two lateral sides of the hollow body may comprise a creaseline arrangement for assisting the lateral sides to conform to the shapeof the upper end of the hollow body being formed by means of the topportion.

The crease line arrangement may extend from a lower region of the hollowbody to the upper end, wherein said lower region is arranged between thebottom end and said upper end. The crease line arrangements areadvantageous since they provide better conformity between the hollowbody and the top portion, which means that the integral or recessedhandle is made more distinct.

The hollow body may be made of a packaging laminate.

According to a second aspect of the invention, a blank made of apackaging material comprising pre-formed crease lines is provided. Theblank is configured such that it forms a package according to the firstaspect of the invention when its lateral sides are sealed together toform a hollow body and a bottom section of said hollow body is sealed toform a closed bottom end, when it is folded along the pre-formedcrease-lines, and when it is connected to a top portion of a polymericmaterial.

An upper end of the hollow body may be adapted to coincide with saidperiphery of said top portion defining a planar shape having a waist.

According to a third aspect of the invention, a method for forming apackage according to the first aspect of the invention is provided. Themethod comprises the steps of providing the hollow body by sealing twolateral ends of a blank, closing one end of said hollow body byinjection molding the top portion onto the upper end of said hollowbody, filling said hollow body with a food product, and closing thepackage by sealing the bottom end of said package.

According to a fourth aspect of the invention, a package for enclosing afood product is provided. The package comprises a hollow body of apackaging laminate extending from a closed bottom end towards an upperend, and a top portion of a polymeric material being connected along itsperiphery to said upper end of said hollow body for closing saidpackage, wherein said closed bottom end is defining a planar surfacehaving a D-shape.

This is advantageous in that the package may be held comfortably, as thefingers of a user's hand may follow the smooth curvature of the hollowbody, defined at its lower end as a D-shape. A D-shape is hereby definedas a planar shape having two corners in a first end and three or morecorners in the second end. Thus, a package having a bottom D-shape maythus have a main body having two folding/creasing lines coinciding withthe two corners of the first end such that a package with the propertiesof a rectangular parallelepiped in one end and with properties of acylinder formed package in the other end is provided.

The closed bottom end may have a back side, a front side, and twolateral sides connecting the front side to the back side, wherein theback side extends between two corners, and the front side extendsbetween four corners. Hence, facilitated folding is provided.

The periphery of said top portion may define a planar shape having awaist. The planar shape may be symmetrical. This is advantageous in thata handle is provided showing a sufficient stability when the package isfilled as well as when the package is almost empty without the use ofexcess material.

The top portion may comprise a reclosable opening for allowing foodproduct being enclosed inside said package to be discharged through saidopening. Said opening may be arranged off-center on said top portion.Hence, the user may be directed in how to hold the package for optimumperformance during discharge of enclosed food product.

The cross-section of the closed bottom end of said hollow body may havea shape being different from the planar shape being defined by theperiphery of said top portion. This allows flexible design, stillproviding advantageous functionality and robustness.

The top portion may be made of HDPE, which is preferred since the topportion may be injection molded by well-known processes.

Each one of two lateral sides of the hollow body may comprise a creaseline arrangement for assisting the lateral sides to conform to the shapeof the upper end of the hollow body being formed by means of the topportion.

The crease line arrangement may extend from a lower region of the hollowbody to the upper end, wherein said lower region is arranged between thebottom end and said upper end. The crease line arrangements areadvantageous since they provide better conformity between the hollowbody and the top portion, which means that the integral or recessedhandle is made more distinct.

The hollow body may be made of a packaging laminate.

According to a fifth aspect of the invention, a blank made of apackaging material comprising pre-formed crease lines is provided. Theblank is configured such that it forms a package according to the fourthaspect of the invention when its lateral sides are sealed together toform a hollow body and a bottom section of said hollow body is sealed toform a closed bottom end, when it is folded along the pre-formedcrease-lines, and when it is connected to a top portion of a polymericmaterial.

According to a sixth aspect of the invention, a method for forming apackage according to the fourth aspect of the invention is provided. Themethod comprises the steps of providing the hollow body by sealing twolateral ends of a blank, closing one end of said hollow body byinjection molding the top portion onto the upper end of said hollowbody, filling said hollow body with a food product, and closing thepackage by sealing the bottom end of said package.

As been mentioned the periphery of the top portion may define a shapehaving a waist. Such shape having a waist may be defined as an hourglassshape. An hourglass shape should in this context be interpreted broadlyas a shape being defined by a closed loop having said waist. Forexample, an hourglass shape includes a continuous parametric curve,which when observed in 2D coordinates starts at a first point, andcontinues in the presented order to a local maximum, a local minimum, alocal maximum, and to a turning point, at which the curve changesdirection and returns to the starting point via a local maximum, a localminimum, and a local maximum in said order.

BRIEF DESCRIPTION OF THE DRAWINGS

The above, as well as additional objects, features and advantages of thepresent invention, will be better understood through the followingillustrative and non-limiting detailed description of preferredembodiments of the present invention, with reference to the appendeddrawings, wherein:

FIG. 1 is a perspective view of a package according to a firstembodiment.

FIG. 2 is a top view of the package shown in FIG. 1.

FIG. 3 is a perspective view of a package according to a furtherembodiment.

FIG. 4 is a perspective view of a package according to a yet furtherembodiment.

FIG. 5 is a top view of a blank of packaging material according to anembodiment.

FIG. 6 is a view from below of the package shown in FIG. 1.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

With reference to FIGS. 1 and 2, a first embodiment of a package 100 isshown. The package 100 has a hollow body being made of a packaginglaminate 110 and extending from a closed bottom end 112 towards an upperend 114. The upper end 114 is closed by means of a top portion 120 madeof a thermoplastic material, such as HDPE (high density polyethylene).The top member 120 has a convex shape for allowing a smooth transitionbetween the hollow body 110 and the top portion 120.

The top portion 120 is defined by its periphery 122, to which the upperend 114 of the hollow body 110 is attached. The periphery 122 is forminga closed loop having a front side 124, a back side 126, and two lateralsides 128 a,b.

The front side 124 of the periphery 122 may have a shape of an arc A₁ ofa first circle, while the back side 126 can have a shape of an arc A₂ ofa second circle. In this particular embodiment, the radius of the firstcircle corresponding to the arc A₁ is smaller than the radius of thesecond circle corresponding to the arc A₂. Each one of the two lateralsides 128 a,b is extending from an endpoint of the arc A₁ to an endpointof the arc A₂ in a curved direction, such that the periphery 122 of thetop portion 120 is forming an hourglass shape, i.e. a shape having awaist. Hence, the width of the top portion 120 exhibits a minimum, beingthe waist, somewhere between the front side 124 and the back side 126.

The top portion 120 can include an opening mechanism 130 which may bearranged off-center towards the front side 124. The opening mechanism130 may be a screw cap, a snap-locking cap or any other reclosablemechanism known per se.

The top portion 120 is made of a material being more rigid than thepackaging laminate of the hollow body 110. Hence, the upper end 114 ofthe packaging laminate will adapt to the permanently shaped periphery ofthe top portion 120.

The hollow body 110 may have a closed bottom end 112, of which thebottom surface, i.e. the surface facing the support surface when thepackage is standing, has a shape that differs from the shape of theperiphery of the top portion 120. This allows the bottom end 112 to beshaped by folding along predefined crease lines, while the top portion120 may have rounded corners for increasing the appeal to the user.

When folding the bottom end 112, the most simple shape to be achieved isa rectangle having perpendicular corners. However, due to e.g. tensilestress within the packaging material, it is advantageous if the shape ofthe bottom end to some extent conforms to the shape of the upper end114, i.e. the shape of the periphery 122 of the top portion 120. Thismay be achived by adding crease lines such that perpendicular cornersare avoided. In the embodiment shown in FIGS. 1 and 2, the front side ofthe bottom end 112 has three faces being angled relative each other,while the back side has only one. This configuration is advantageous inthat the bottom end 112 is conforming to the upper end 114 such that thetensile stress within the hollow body 110 is reduced. Hence, as the arcA1 of the front side has a small radius, this is compensated by themulti-edge front side of the bottom end 112. Contrary to this, as thearc A2 of the back side has a larger radius, it does not need to becompensated leaving a single edge back side of the bottom end 112. Afurther advantage with the provision of multi edge sides is thatsterilisation agents may more easily reach the interior corners, whichallows for a more thoroughly sterilisation process.

Hence, the gripable portion of the package, i.e. the hollow body 110,has a polygonial bottom and a waist-shaped upper end 114. The waist willthus contribute to the formation of a handle integrally formed withinthe hollow body 110, which structure being increasingly pronounced asthe upper end 114 is approaching.

The lateral sides of the bottom end 112 are both single edge sides, andthe hollow body 110 further comprises a crease line arrangement 140 forallowing the lateral sides of the hollow body 110 to conform to theperiphery 122 of the top portion 120.

The crease line arrangement 140 is preferably identical on both sides ofthe package, and the package is preferably symmetric in relation to aplane of symmetry S. Said symmetry plane S is substantiallyperpendicular to a plane constituting the bottom 112 of the package. Thesymmetry plane S naturally extends through the center of the package100, from the front side 124 to the back side 126.

The crease line arrangement 140 will be described in detail in relationto the description of the corresponding blank.

The waist of the top portion 120 allows for an increased functionalityand stability of the package 100, as an integral handle is formed withinthe package 100. The recessed portion along the hollow body 110 beingformed by means of the waist of the top portion 120 is suitable toreceive the fingers of a user, i.e. a thumb on one side and theresulting fingers on the opposite side. The recessed portion is furtheremphasized by the additional crease line arrangement 140.

When the package 100 is completely filled with a food product, theenclosed food product is creating a resistance against the recessedportion being further recessed when a user grasps the package. In thesame way, when the package is almost empty, there is no longer a foodproduct to resist the pressing force of the user. Hence, by determiningthe shape of the top portion as a function of the dimensions of thepackage, the robustness of the packaging laminate, as well as thephysical properties of the food product to be enclosed, a package may beprovided having an integral handle which is formed by a minimum ofmaterial costs, while still providing a sufficient rigidity relative theweight of the package.

In FIGS. 3 and 4 alternative embodiments of a package are shown. Withreference to FIG. 3, the package 200 comprises a hollow body 210 beingsimilar to the hollow body 110 of the package 100 shown in FIG. 1. Thehollow body 210 extends from a closed bottom end 212 to an upper end 214being attached to a top portion 220. The top portion 220 is defined byits periphery 222 having a front side 224, a back side 226, and twolateral sides 228 a,b connecting the front side 224 to the back side226. The top portion 220 is symmetrical along two axes X and Y, thusleaving the arcs defining the front side 224 and the back side 226 ofthe periphery 222 as mirrored copies.

The hollow body 210 comprises a crease line pattern 240 on each one ofthe lateral sides. Each crease line arrangement 240 consists of a firstline 242 arranged perpendicular to the longitudinal direction of thehollow body 200 and extending across the complete lateral side. Further,two crease lines 244 a,b are arranged such that they coincide with thevertical lines forming the interface between the lateral side and thefront side as well as the back side of the hollow body. Two additionalcrease lines 246 a,b are provided, extending from the intersectionbetween the transversal crease line 242 and the vertical crease lines244 a,b towards the center of the upper end 214.

The front side and the back side of the hollow body 210 also has atransversal crease line, arranged at the same height as the transversalcrease line 242.

The bottom end 212 of the hollow body 210 is formed to adapt to theshape of the periphery 222 of the top portion 220. Hence, each one ofthe front side and the back side of the bottom end 212 is folded to aV-shape, thus reducing the tensile stress within the packaging laminate.

With reference to FIG. 4, the package 300 comprises a hollow body 310being similar to the hollow body 110 of the package 100 shown in FIG. 1.The hollow body 310 extends from a closed bottom end 312 to an upper end314 being attached to a top portion 320. The top portion 320 is definedby its periphery 322 having a front side 324, a back side 326, and twolateral sides 328 a,b connecting the front side 324 to the back side326. The top portion 320 is symmetrical along two axes X and Y, thusleaving the arcs defining the front side 324 and the back side 326 ofthe periphery 322 as mirrored copies. The top portion 320 furthercomprises an opening mechanism being arranged at the center of the topportion 320.

The hollow body 310 comprises a crease line pattern 340 on each one ofthe lateral sides. Each crease line arrangement 340 consists of aU-shaped line 342 arranged such that the legs of the U coincide with thevertical crease lines forming the interface between the lateral sidesand the front side and the back side of the hollow body.

The bottom end 312 of the hollow body 310 is formed to adapt to theshape of the periphery 322 of the top portion 320. Hence, each one ofthe front side and the back side of the bottom end 312 is folded to athree edge side, thus reducing the tensile stress within the packaginglaminate.

A blank 400 of packaging material is shown in FIG. 5. The blank 400 isprovided to form a package according to what has previously beendescribed with reference to FIGS. 1 and 2. The blank 400 of packagingmaterial has a first end 402, a second end 404 and two lateral ends 406,408 extending between the first end 402 and the second end 404. Theblank comprises a first set of crease lines 410 arranged at said firstend 402, and a second set of crease lines 420 arranged at said secondend 404, wherein said blank is sealable along the two lateral ends 406,408 for forming a hollow body. The first set of crease lines 410 isdisposed such that said first end 402 is forming a closed bottom endwhen said blank is sealed and folded along said first set of creaselines 410.

The second set of crease lines 420 may be disposed such that said secondend 404 is assisted in conforming to a top portion having a waist.

The second set of crease lines 420 (corresponding to the crease linearrangement 140 in the package 100) extends from the upper end 404towards a lower region, said lower region being arranged between theclosed bottom end 402 and said upper end 404. Further, the second set ofcrease lines 420 comprises a first pair of mutual reversed crease lines422. One crease line is positioned on each side of the plane of symmetryS of the package to be formed. The plane S is shown as a symmetry linein FIG. 5. Said mutual reversed crease lines 422 are being positioned ata distance from the symmetry plane S and are angled in respect of saidplane. Further, the second set of crease lines 420 comprises a secondpair of mutual reversed crease lines 424, wherein one crease line ispositioned on each side of the symmetry plane S. As with the firstmutual reversed crease lines 422, the second crease lines 424 are beingpositioned at a distance from the plane and are angled in respect ofsaid plane. Furthermore, the second set of crease lines 420 comprises athird pair of mutual reversed crease lines 426, wherein one crease lineis positioned on each side of the symmetry plane and, like the othercrease lines, they are positioned at a distance from said plane andangled in respect of said plane.

The first pair of crease lines 422 is arranged closest to the plane Sand is having a first angle α to the plane S. The second pair creaselines 424 is having a second angle β to the plane S, said second angle βbeing larger than the first angle α. The third pair of crease lines 426is having a third angle γ to the plane, said third angle γ being largerthan the second angle β. The crease lines of the first and third pairs422, 424, 426 on each respective side of the plane, are connected by acurve 428. Hence, a first and a third crease line 422, 426 from eachpair forms a single crease line.

The crease lines of the first, second and third pairs 422, 424, 426 areangled such in relation to the plane that the angles α, β, γ increase ina direction towards the upper end 404 of the blank, i.e. the creaselines diverge in a direction towards the upper end 404.

Further, the first set of crease lines 410 may comprise a firstconfiguration of crease lines 412 disposed such that a front side havingfour corners of the bottom end is formed when the blank is folded alongthe first disposition of crease lines 412.

The first set of crease lines 410 may comprise a second configuration ofcrease lines 414 disposed such that a back side having two corners ofthe bottom end is formed when the blank is folded along the seconddisposition of crease lines 414.

The first set of crease lines 410 and the second set of crease lines 420may be arranged such that a longitudinal sealing formed when the twolateral ends 406, 408 are sealed to each other does not pass through thefirst or second set of crease lines 410, 420.

The longitudinal sealing extends from the second end 404 to a corner ofthe front side of the bottom end.

As can be seen in FIG. 5, the second set of crease lines 420 is arrangedin the same end of the blank as the second configuration 414 of thefirst crease lines 410. Both the second set of crease lines 420 and thesecond configuration 414 of the first crease lines 410 are centrallyaligned to the symmetry plane S.

FIG. 6 illustrates an example of a bottom end 500, seen from below, ofthe package according to the first embodiment illustrated in FIGS. 1 and2 based on the blank illustrated in FIG. 5. For illustrative purposesthe creasing lines are indicated by dotted lines.

A first end, which may be placed under a handle portion of the package,can be provided with two corners 502 a, 502 b, and a second end, whichmay be placed under a part of the top portion provided with an opening,can be provided with four corners 504 a, 504 b, 504 c, 504 d.

A first bottom sealing end 506 and a second bottom sealing end 508 canbe folded inwardly towards a middle portion 510 of the bottom sealing.

A longitudinal sealing 512 of the package can be placed in an end of oneof the lateral sides 128 a,b of the package placed next to the backsideof the bottom, which may be provided with four corners. An advantage ofplacing the longitudinal sealing in this end is that no longitudinalsealing is needed in the handle portion of the package. This is anadvantage, since it is easier to form a handle portion of the hollowbody of the package without the longitudinal sealing being present.

The invention has mainly been described above with reference to a fewembodiments. However, as is readily appreciated by a person skilled inthe art, other embodiments than the ones disclosed above are equallypossible within the scope of the invention, as defined by the appendedpatent claims. It should further be noted that any reference to “front”,“back”, “upper”, or “lower”, etc., is only made for illustrative purposeand is by no means limiting the scope of the claims.

1. A package for enclosing a food product, comprising a hollow body of apackaging material extending from a closed bottom end towards an upperend, and a top portion of a polymeric material being connected along itsperiphery to said upper end of said hollow body for closing saidpackage, wherein said periphery of said top portion is defining a planarshape having a waist.
 2. The package according to claim 1, wherein saidplanar shape is symmetrical.
 3. The package according to claim 1,wherein said top portion comprises a reclosable opening for allowingfood product being enclosed inside said package to be discharged throughsaid opening.
 4. The package according to claim 3, wherein said openingis arranged off-center on said top portion.
 5. The package according toclaim 4, wherein the top portion has a front portion and a back portionbeing separated by means of said waist, wherein said opening is arrangedat the front portion.
 6. The package according to claim 1, wherein thecross-section of the closed bottom end of said hollow body has a shapebeing different from the planar shape being defined by the periphery ofsaid top portion.
 7. The package according to claim 1, wherein the topportion is made of HDPE.
 8. The package according to claim 1, whereineach one of two lateral sides of the hollow body comprises a crease linearrangement for assisting the lateral sides to conform to the shape ofthe upper end of the hollow body being formed by means of the topportion.
 9. The package according to claim 8, wherein the crease linearrangement extends from a lower region of the hollow body to the upperend, wherein said lower region is arranged between the bottom end andsaid upper end.
 10. The package according to claim 1, wherein the hollowbody is made of a packaging laminate.
 11. A blank made of a packagingmaterial comprising pre-formed crease lines, wherein the blank isconfigured such that it forms a package according to claim 1 when itslateral sides are sealed together to form a hollow body and a bottomsection of said hollow body is sealed to form a closed bottom end, whenit is folded along the pre-formed crease-lines, and when it is connectedto a top portion of a polymeric material, said top portion having aperiphery defining a planar shape having a waist.
 12. The blankaccording to claim 11, having a first end, a second end and two lateralends extending between the first end and the second end, said blankcomprising a first set of crease lines arranged at said first end,wherein said blank is sealable along the two lateral ends for forming ahollow body, said first set of crease lines is disposed such that saidfirst end is forming a closed bottom end when said blank is folded alongsaid first set of crease lines, and wherein the first set of creaselines comprises a first configuration of crease lines disposed such thata front side of the bottom end is formed when the blank is folded alongthe first disposition of crease lines, wherein said front side has atleast three corners, and a second configuration of crease lines disposedsuch that a back side of the bottom end is formed when the blank isfolded along the second disposition of crease lines, wherein said backside has two corners.
 13. The blank according to claim 12, wherein thefirst configuration of crease lines is disposed such that a front sideof the bottom end is formed when the blank is folded along the firstdisposition of crease lines wherein said front side has at least threecorners.
 14. The blank according to claim 12, further comprising asecond set of crease lines arranged at said second end, wherein saidsecond set of crease lines is disposed such that said second end isassisted in conforming to a top portion having a waist.
 15. The blankaccording to claim 14, wherein said second set of crease lines comprisecrease lines extending from the second end towards a lower region, saidlower region being arranged between the first end and said second end,said crease lines being disposed such at the second end that they maysubstantially align with the waist of a top portion.
 16. The blankaccording to claim 14, wherein said second set of crease lines extendsfrom the second end towards a lower region, said lower region beingarranged between the first end and said second end, and wherein saidsecond set of crease lines, comprises a first pair of mutual reversedcrease lines, wherein one crease line is positioned on each side of aplane of symmetry of the package to be formed, said plane beingsubstantially perpendicular to a plane corresponding to the packagebottom, said first mutual reversed crease lines being positioned at adistance from said plane and angled in respect of said plane, comprisesa second pair of mutual reversed crease lines, wherein one crease lineis positioned on each side of said plane of symmetry, said second mutualreversed crease lines being positioned at a distance from said plane andangled in respect of said plane, and comprises a third pair of mutualreversed crease lines, wherein one crease line is positioned on eachside of said plane of symmetry, said third mutual reversed crease linesbeing positioned at a distance from said plane and angled in respect ofsaid plane.
 17. The blank according to claim 16, wherein the first pairof mutual reversed crease lines is arranged closest to the plane and ishaving a first angle to the plane, the second pair of mutual reversedcrease lines is having a second angle to the plane, said second anglebeing larger than the first angle, the third pair of mutual reversedcrease lines is having a third angle to the plane, said third anglebeing larger than the second angle, the crease lines of the first andthird pairs, on each respective side of the plane, are connected by acurve, and the crease lines of the first, second and third pairs areangled such in relation to the plane that the angles increase in adirection towards the second end.
 18. The blank according to claim 14,wherein the first set of crease lines and the second set of crease linesare arranged such that a longitudinal sealing formed when the twolateral ends are connected to each other does not pass through the firstor second set of crease lines.
 19. A reel of packaging materialcomprising a continuous web having pre-formed crease lines, wherein thereel is configured such that a plurality of blanks according to claim 11are formed when the continuous web is cut.
 20. A method for forming apackage according to claim 1, comprising the steps of: providing thehollow body by sealing two lateral ends of a blank closing one end ofsaid hollow body by injection molding the top portion onto the upper endof said hollow body, filling said hollow body with a food product, andclosing the package by sealing the bottom end of said package.